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Powerful Piston Engine by RED Aircraft Tested in Germany – RED Aircraft GmbH
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Raikhlin Aircraft Engine Developments (RED), a new venture founded by Wladimir Raikhlin and his associates, has flown a 500-horsepower diesel engine on a modified Yak 52. The propeller for the water-cooled, twelve-cylinder engine called RED A03 is gear driven.

It was built by RED Aircraft GmbH in Adenau, Germany. The engine generates 500 hp for takeoff at 3,900 rpm. The engine weight at the moment is 705 pounds, according to diesel engine consultant Andre Teissier-duCros. The company brochure does not give the weight, marking that specification as “to be announced.” The weight includes two alternators, a starter, an engine/gearbox oil heat exchanger, and a prop governor.

The engine will first be certified in Europe. Any changes required during development could increase the weight. The engine is intended to bridge the gap between piston engines and turboprop engines.

Source : https://www.aopa.org/